什么是qualified-id / name和unqualified-id / name？ [英] What are qualified-id/name and unqualified-id/name?

问题描述

我想知道是否有人可以解释这些术语，因为我在许多地方遇到这些术语。我知道一些关于他们的基本理论，但不知道我知道是对还是错。

那么任何人都可以解释这些条款吗？

解决方案

一个限定名称是一种具有某种指示的属性，例如类规范，命名空间规范等。非限定名称是不合格的名称。

阅读James McNellis的答案：

什么是嵌套名称说明符？

b
$ b

  struct A {
 struct B {
 void F（）; 
}; 
}; 
  

• A em>，但没有 nested-name-specifier 。


• A :: B > qualified-id 和 A :: 是一个嵌套名称说明符。


• :: A :: B 是 qualified-id 和 A :: a qualified-id ，并且 B :: 和 A :: B :: -name-specifiers 。


• :: A :: B :: F ，并且 B :: 和 A :: B ::
。

I was wondering if someone could explain there terms since I encounter them in many places. I know some basic theory about them but not sure what I know is right or wrong.

So can any one please explain these terms?

解决方案

A qualified name is one that has some sort of indication of where it belongs, e.g. a class specification, namespace specification, etc. An unqualified name is one that isn't qualified.

Read James McNellis' answer here:

What is a nested name specifier?

Given:

struct  A {
    struct B {
        void F();
    };
};

• A is an unqualified-id.
• ::A is a qualified-id but has no nested-name-specifier.
• A::B is a qualified-id and A:: is a nested-name-specifier.
• ::A::B is a qualified-id and A:: is a nested-name-specifier.
• A::B::F is a qualified-id and both B:: and A::B:: are nested-name-specifiers.
• ::A::B::F is a qualified-id and both B:: and A::B:: are nested-name-specifiers.

---

这篇关于什么是qualified-id / name和unqualified-id / name？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！